Fredhome Precision Pin Vise Model Mini Hand Drill Set with 10 Twist Drills Bits Set Rotary Tools Mini wood hand drill chuck for jewelry tool micro twist bit Precise, accurate and efficient Do not fit steel, iron, stone, such hard things Length: 95mm ; Material: Aluminium Alloy Perfect for drilling wood,Jin Gang,linden,Ox horn,amber,olive, walnut, plastic and other materials